Not really. I have a horrible suspicion that it is something with the gallery because screenshotmee appears to do all that it was designed to do. It is only when you try to view the image in the gallery that a problem crops up. But the gallery is working fine for images and video from the camera... go figure. It also might be tracker related. One day I might look into it, but as I said in my previous post, I'm not bothered that screenshotmee isn't working completely.
tracker-control --reindex-mime-type=image/png